You can of course refactor these to styles like this: Īnd if you wish to use predefined color styles, it might look like this: #1d1d1d Updating just the header, this looks like: First enable this preview feature by adding the flag to your : public App()ĭevice.SetFlags(new string) To now control the colors for the dark and light of the head and text, you can replace the static colors with an AppThemeBinding that will react at runtime to the OS theme settings. Contrast that with the header which remains blue and the header text that remains white. When you toggle the iOS simulator between dark and light modes (CMD+SHFT+A) you can see the ContentPage background shift from white to black, and the text from black to white. For example, look at how this new “Blank App” template looks on iOS: When you set no styles or colors, your UI will default to the theme native to the platform the app runs on.

Why stop there? You can also customize the light and dark colors used throughout your app UI, and even give the user a choice to control their own app theme. In fact, if you do nothing at all, your Xamarin.Forms apps will respect the user’s OS preference.

All major OSes now support dark and light app themes, and Xamarin.Forms 4.7 has arrived to make this easy to add to your applications.

Change theme android studio error